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Theory of Flight
Theory of Flight
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This is a question you need to know before you get an exam for piloting
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61 cards
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1
What is the critical angle of attack
All of the above
when you are about to fall
When the angle of attack is 20 deg or more
When the pitch is high
2
Define Relative Airflow
When the air is relatively flowing to the plane
Used to describe the humidity
Used to measure the airspeed
Term used to describe the direction of the airflow with respect to the wing
3
Difference between the static and dynamic stability
Static: When you can't do much
When your aircraft 'bumps' once
Static: initial. Dynamic: Overall tendency of aircraft to return to its pos
Overall: You can do manoeuvers still
4
What is a wingtip vortices
When the plane makes white lines
Circular patterns of rotating air left behind a wing
When the air spins like a fan
Jet makes it
5
What is Streamlining?
A design device by which a body is so shaped that drag is minimized.
All of the above
When something presents a smooth flow
When you are going straight
6
What angle of attack should give you your best glide speed for range
highest possible
90 deg
18 deg
22 deg
7
What is a turbulent layer
When you can't control your plane
The layer at which the air is turbulent
You can result in crash
The whole body is turbulent
8
What is a boundary layer
Thin sheet of layer lying over the surface of the wing
None of the above
This can cause drag, we don't need it
where the air can't pass
9
Lift and drag depend on what
Aspect ratio, drag
None of the above
density of air
Angle of attack, shape of airfoil, plan area of airfoil, square of velocity
10
What is Longitudinal Stability
Stability around the Lateral Axis
Stability around the Normal Axis
Stability around the Longitudinal Axis
11
What is this image know as?
Two bottles of whiskey
The Venturi Tube
Two Cilinders
Mathematical pressure formula tube
12
What is Directional Stability
Stability around the Lateral Axis
Stability around the Normal Axis
Stability around the Longitudinal Axis
13
Define down wash
All of the above
When the air goes downward on an aircraft wing at the trailing edge
Caused by an aircraft
The downward deflection of an air stream by aircraft wing
14
Define Form Drag
None of the above
Maybe it's just the plane
Refers to the drag created by the shape of a body
Refers to how smooth ladies are
15
Vne and Vno mean the same
False
True
16
The two methods of correcting aileron drag are
I don't know
Go to the apron, and fix what's needed
Frise, and Differential Aileron
Use less drag, and get in flight
17
What is Vx and Vy
Vx= Best angle of Climb. Vy=Best rate of Climb
Vy= Best angle of descent. Vx= Best rate of descent
Vy= Best angle of climb. Vx= Best rate of climb
Vx= Best angle of descent. Vy= Best rate of descent
18
Vne means
Never do this. Go back
your ok
I'm so out. I dumb enough to lick this answer
Never exceed
19
The aspect ratio is the ratio of the actual weight to the gross weight
True
False
20
What is Lateral Stability
Stability around the Normal Axis
Stability around the Longitudinal Axis
Stability around the Lateral Axis
21
What is the angle of incidence
The angle at which you can no longer manoeuver.
The plane starts an incident when it reache sat a certain angle
The angle at which the plane is inclined to the longitudinal axis
None of the above
22
What is the difference between pitot and static pressure
All of the above
Static measure the initial pressure outside
Pitot measure the atmospheric pressure, in HPA
Pitot Mesaure the following: ASI. While Static measure all 3 indicators
23
Define Parasite Drag
Drag that does not contribute to lift
obviously just parasite and that's it.
Important drag
it's what skydivers use
24
The best lift/weight ratio of obtained at what Angle of attack?
None of the above
From 14 to 22 deg
from 18 to 28 deg
from the highest angle of attack
25
What is special about laminar flows airflows
It doesn't produce drag at all.
---Lack of control
--Control or---
It's structural design is intended to make possible better boundary layer--
26
Vb means
Max gust intensity speed
Maneuvering gust speed
Keep going
Max speed
27
What is your load factor on a 45 degrees turn
1.987
1.75
2
1.41
28
What is your load factor on a 30 degrees turn
1.112
1.159
1.80
1.55
29
What direction does air flow on: Bottom wing, Top Wing
T, Up. B, Down
T,Same as the direction of aircraft moving. B, Opposite direction
T, Inward. B, Outward
They both flow on the opposite direction of the airplane moving
30
Define stall
All of the above
When you have almost no airspeed
Occurs at higher angle of attack
When wings can no longer produce lift
31
What does the venturi tube explain
Science of the air
Math
The pressure difference on an aircraft wing
The bottle of air flowing
32
Difference between Spoilers and Flaps
none of the above
They both cause more drag, but spoilers reduces lift.
They both cause more lift, except flaps cause less drag
They don't cause lift, they both cause drag
33
Define airfoil
a flow of air
The air passing by the wing
any surface that is made to make the aircraft able to produce lift
When the flow passes through the aircraft
34
What is a laminar layer
When the air is laminar
It's a type of wing and layer
Laminar meaning "line" coming from a greek word
The layer at which the air is smooth
35
What is your load factor on a 15 degrees turn
1.04
2
0.80
1.5
36
The heavier aircraft will have the larger wing tip vortices
False
True
37
Define Induced Drag
None of the above
Drag that isn't bad
Drag that does contribute to lift
Drag that is induced
38
What are the four forces acting on an aircraft in flight
Thrust, Lift, Drag, Weight/Gravity
Right Left, Normal, Upsidedown
Forward, backward, up, down
Planes goes up, Normal, then down for landing
39
Define camber
airfoil meets the other on the trailing edge
All of the above
air goes below wings
Curvature of the upper and lower surface
40
What are the three types of dynamic stability
None of the above
Right tilted, Middle, Left tilted
Constant, High, Low
Pos, Neu, Neg
41
Most flight performance will cause what movement on take off
Swept back
Strut
None of the above
Dihedral
42
Weight acts through what point
GRAVITY DUHHHHH!!
The center of gravity
load factor
Aspect ratio
43
Define Precession
A precise plane
A precise time to fly
It's a force that makes the plane go left due to force pushing down prop
Acts like a gyroscope
44
What is the difference between a spin and a spiral dive
a spin is also the same a spiral
A spiral is a steep constant dive
A spin is developed after an aggravated stall
None of the above
45
What is a couple
When we have couple of planes
When they're couple of forces going the same and opposite direction
When two forces , Thrust and Drag are equal and opposite but parallel.
When the is a couple on the wing
46
Difference between Slots and Slats
Slat: When the airfoils won't move
Slot: When the airfoils will move
Slot: passageways built into the wing a short distance from leading edge
Slat: Auxiliary airfoils fitted to leading edges
47
Define Interference Drag
When drag is making the air turbulent
Maybe when we throw things out during flight, we cause it
Drag that is caused by the mixing of airflow streamlines
Any object interfering with the air
48
What is your load factor on a 60 degrees turn?
2.50
3
5
2
49
What is a transition point
I don't know
When the air translates into water
The point at which the boundary layer changes from laminar to turbulent
When you can't do much
50
Define Torque
Newton's 3rd law
The reaction of the spinning prop causing the airplane to rotate count-clck
Powerpoint
I don't know, it's a hard word
51
Define Equilibrium
Thrust+Drag are equal an opposite
When all forces are equal on your aircraft during flight
When the four forces are Equal and the same
When my plane in perfectly straight during flight
52
Vno means
too fast
Max speed
Maneuvering speed
Max weight
53
Define Slipstream
The air acting as the throttle
The air pushed back by the wind
The air pushed backwards by revolving prop that has a corkscrew motion
When the wind is slipping by the aircraft
54
Vfe means
Slow Speed
Max flaps extended
Max spoilers extended
Max speed
55
All types of drag are the same
False
True
56
Define Skin Friction
Aircraft damage
The tendency of air flowing over a body to cling it's surface
When the aircraft's body is subjected to shearing
When the drag is shearing the skin
57
Define Asymmetric Thrust
Regular thrust
Another left turning tendency.
The amount of thrust your aircraft can go one globe revolution/sec! Crazy!!
More thrust than normal
58
What is the angle of attack?
Where the airfoil meets the relative airflow
None of the above
When the wind attacks the airplane at a specified angle
When you experience turbulence because of your angle
59
How do we create the extra lift that is needed on steep turns?
Pull up!!
Turn the opposite direction you are turning
Increased Angle of Attack
Make a 360 roll
60
Va means
Accelerate more
Declelerate
Maneuvering speed
Max Capacity
61
What is ground effect
None of the above
The effect of added aerodynamic buoyancy produced by a cushion of air below
When the ground interferes with the formation of a large wing tip vortices
Both mean the same
